<div id="symbol_box">
	<div class="softkeyboard">
		<div class="mt_input"><input type="text" name="text1" class="shuru input_cur" readonly="readonly"></div> 
		<ul class="rightBtn"> 
			<li><div><input class="i_button i_button_num" type="button" onclick="addValue('+');" value=" + "></div></li> 
			<li><div class="center"><input class="i_button i_button_num" type="button" onclick="addValue('-');" value=" - "></div></li> 
			<li><div><input class="i_button i_button_num" type="button" onclick="addValue('×');" value=" × "></div></li> 
			<li><div><input class="i_button i_button_num" type="button" onclick="addValue('÷');" value=" ÷ "></div></li> 
			<li><div class="center"><input class="i_button i_button_num" type="button" onclick="addValue('(');" value=" ( "></div></li> 
			<li><div><input class="i_button i_button_num" type="button" onclick="addValue(')');" value=" ) "></div></li> 
			<li><div><input class="i_button i_button_num" type="button" onclick="addValue('=');" value=" = "></div></li>
			<li><div class="center"><input class="i_button i_button_num" type="button" onclick="clearValue();" value="清空"></div></li> 
			<li><div><input class="i_button i_button_num" type="button" value=" ←" onclick="backspace();"></div></li>
		</ul> 
		<li class="Enter"><div><input class="i_button i_button_num" type="button" onclick="nextValue();" value="确定"></div></li>
	</div>
</div>